package com.wwz.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Repository;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;

@Controller
@RequestMapping("kaptcha")
public class KaptchaController {

    @Autowired
    Producer producer;

    @GetMapping("kaptcha-image")
    @ResponseBody
    public void getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception {
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        String capText = producer.createText();
        System.out.println("******************当前验证码为******************"+capText);
        // 将验证码存于session中
        request.getSession().setAttribute("vrifyCode", capText);
        BufferedImage bi = producer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();
        // 向页面输出验证码
        ImageIO.write(bi, "jpg", out);
        try {
            // 清空缓存区
            out.flush();
        } finally {
            // 关闭输出流
            out.close();
        }
    }

    @RequestMapping("/judguKaptcha")
    @ResponseBody
    public ModelAndView imgvrifyControllerDefaultKaptcha(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse){
        ModelAndView andView = new ModelAndView();
        String captchaId = (String) httpServletRequest.getSession().getAttribute("vrifyCode");
        String parameter = httpServletRequest.getParameter("yzCode");
        System.out.println("Session  vrifyCode "+captchaId+" form yzCode "+parameter);
        if (!captchaId.equals(parameter)) {
            andView.addObject("info", "错误的验证码");
            andView.setViewName("test");
        } else {
            andView.addObject("info", "登录成功");
            andView.setViewName("succeed");
        }
        return andView;
    }

    @RequestMapping("toTest")
    public String toTest(){
        return "test";
    }
}
